diff --git a/src/Plugin/Alipay/SignPlugin.php b/src/Plugin/Alipay/SignPlugin.php
index 3c54abf..b4189d6 100644
--- a/src/Plugin/Alipay/SignPlugin.php
+++ b/src/Plugin/Alipay/SignPlugin.php
@@ -45,7 +45,7 @@ class SignPlugin implements PluginInterface
         }, ARRAY_FILTER_USE_BOTH);
 
         $rocket->setPayload(
-            $payload->merge(['biz_content' => json_encode($contents, JSON_UNESCAPED_UNICODE)])
+            $payload->merge(['biz_content' => json_encode($contents)])
         );
     }